CN111951677A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN111951677A CN111951677A CN202010626770.2A CN202010626770A CN111951677A CN 111951677 A CN111951677 A CN 111951677A CN 202010626770 A CN202010626770 A CN 202010626770A CN 111951677 A CN111951677 A CN 111951677A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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Abstract
The application provides a display panel, a manufacturing method thereof and a display device, wherein the manufacturing method comprises the following steps: providing a display substrate, wherein the display substrate is provided with a first display area and a second display area, the second display area surrounds the first display area, and the second display area comprises a first sub-display area and a second sub-display area; one surface of the display substrate is provided with a plurality of pixel points which are arranged in an array manner, and pixel gaps are formed between adjacent pixel points; respectively using a first mask plate and a second mask plate on one side of a display substrate with pixel points to form a first electrode layer in a first display area and a second electrode layer in a second display area, wherein the first electrode layer is a patterned electrode layer, and the whole surface of the second electrode layer covers a first sub-display area of the second display area; a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second display area, and the whole surface of the third electrode layer covers a second sub-display area of the second display area; the second electrode layer and the third electrode layer cover the second display region.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display device.
Background
Along with the development of display technology, also higher and higher to display panel's requirement in the market, in order to realize super high screen ratio, propose a hidden technique under the camera screen now, when needs were taken a picture camera regional screen is transparent not to show, and the image can see through the screen and is gathered by the camera module, and when need not take a picture camera regional normal display, the camera is hidden to realize the most genuine full face screen. However, in the existing scheme, the overall transmittance of the camera to the transparent display area is low, and in order to improve the transmittance of the transparent display area as much as possible, a scheme that the cathode layer of the camera area is provided with small holes is provided.
Disclosure of Invention
The invention mainly provides a display panel, a manufacturing method thereof and a display device, which can reduce the coverage area of a cathode in a transparent area so as to increase the overall light transmittance of the transparent display area.
In order to solve the above technical problems, a first technical solution provided by the present invention is: a manufacturing method of a display panel is provided, which comprises the following steps:
providing a display substrate, wherein the display substrate is provided with a first display area and a second display area, the second display area surrounds the first display area, and the second display area comprises a first sub-display area and a second sub-display area; a plurality of pixel points which are arranged in an array mode are arranged on one surface of the display substrate, and pixel gaps are formed between every two adjacent pixel points; respectively using a first mask plate and a second mask plate on one side of the display substrate, which is provided with the pixel points, to form a first electrode layer in the first display area and a second electrode layer in the second display area, wherein the first electrode layer is a patterned electrode layer, and the whole surface of the second electrode layer covers the first sub-display area of the second display area; a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second display area, and the whole surface of the third electrode layer covers the second sub-display area of the second display area; the second electrode layer and the third electrode layer cover the second display region.
The part of the first mask plate corresponding to the first display area is a patterned hollowed-out structure with a closed boundary; the part of the second mask plate corresponding to the second display area except for a frame is of a hollow structure with a closed boundary, and comprises a main part for covering the first display area and shielding the second sub-display area; the third mask plate comprises a main body part for covering the first display area and the first sub-display area.
The patterning structure of the first mask plate is a grid-shaped hollow structure, and a first electrode layer covering the pixel points of the first display area is formed by using the first mask plate; the method further comprises the following steps: a fourth mask plate is arranged on one side, provided with the pixel points, of the display substrate, so that a fourth electrode layer stacked with the first electrode layer is formed in the first display area; the fourth electrode layer connects the first electrode layer to the first electrode layer and/or the second electrode layer.
The patterning structure part of the first mask plate is provided with a plurality of through grooves communicated with at least two positions of the closed boundary, so that the formed first electrode layer covers the pixel points at the through groove positions and is connected with the second electrode layer and/or the third electrode layer.
The through grooves extend in the column direction or the transverse direction and are arranged corresponding to the pixel points, so that the formed first electrode layer has a column direction or transverse direction extending stripe, covers the column direction or the transverse direction of the pixel points and does not cover the column direction or the transverse direction of the pixel gaps.
Wherein the method further comprises: forming a first electrode layer in the first display area by using a first mask plate on one side of the display substrate, which is provided with the pixel points; a second mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a second electrode layer is formed in the first sub-display area; a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second sub-display area; the first sub-display area and the second sub-display area form the second display area, the second display area and the second sub-display area jointly surround the first display area, and the second electrode layer and the third electrode layer integrally cover the second display area and surround the first electrode layer.
In order to solve the above technical problems, a second technical solution provided by the present invention is: provided is a display panel including: the display substrate is provided with a first display area and a second display area, and the second display area surrounds the first display area; a plurality of pixel points which are arranged in an array mode are arranged on one surface of the display substrate, and pixel gaps are formed between every two adjacent pixel points; the first electrode layer is a patterned electrode layer covering the pixel points of the first display area; the whole surface of the second electrode layer covers the first sub-display area of the second display area; and the whole surface of the third electrode layer covers the second sub-display area of the second display area.
The first electrode layer is provided with a strip-shaped electrode layer extending in the column direction or the transverse direction, the strip-shaped electrode layer covers the pixel points in the column direction or the transverse direction, and the pixel gaps in the column direction or the transverse direction are not covered; wherein the first electrode layer is connected to the second electrode layer and/or the third electrode layer.
The first electrode layer comprises a plurality of electrode blocks covering the pixel points, and the pixel gaps in the first display area are exposed out of the first electrode layer; the display substrate is provided with a fourth electrode layer formed by a fourth mask plate on one side of the pixel point; the fourth electrode layer is stacked with the first electrode layer to connect the first electrode layer to the second electrode layer and/or the third electrode layer.
In order to solve the above technical problems, a third technical solution provided by the present invention is: the display device comprises a photosensitive device and a display panel; wherein the display panel comprises the display panel of any one of the above; the photosensitive device is arranged corresponding to the first display area of the display panel and is positioned on one side of the display substrate, which is far away from the pixel points.
The invention has the beneficial effects that: different from the prior art, the patterned electrode layer is formed in the first display area by using the first mask plate on the side, provided with the pixel points, of the display substrate, so that the cathode coverage area of the area is reduced, and the overall light transmittance of the first display area is increased. And a second electrode layer covering the first sub-display area is formed in the second display area by using a second mask plate, a third electrode layer covering the second sub-display area is formed in the second display area by using a third mask plate, the second electrode layer and the third electrode layer cover the second display area, the second display area is subjected to twice vapor deposition, the mask plate is prevented from sagging, and the vapor deposition precision is improved.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the invention;
FIG. 2 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;
FIG. 4 is a top view of a display panel according to an embodiment of the present invention;
fig. 5a is a schematic structural diagram of a first mask plate, a third mask plate and a second mask plate according to an embodiment of the present invention;
fig. 5b is a schematic structural diagram of a display panel manufactured according to the first mask plate, the third mask plate and the second mask plate in fig. 5 a;
fig. 6a is a schematic structural diagram of a first mask plate, a third mask plate and a second mask plate according to another embodiment of the present invention;
fig. 6b is a schematic structural diagram of a display panel manufactured according to the first mask plate, the third mask plate and the second mask plate in fig. 6 a;
fig. 7a is a schematic structural diagram of a first mask plate, a third mask plate and a second mask plate according to yet another embodiment of the present invention;
FIG. 7b is a schematic structural diagram of a display panel manufactured according to the first mask plate, the third mask plate and the second mask plate in FIG. 7 a;
fig. 8a is a schematic structural diagram of a first mask plate, a third mask plate and a second mask plate according to yet another embodiment of the present invention;
FIG. 8b is a schematic structural diagram of a display panel fabricated according to the first mask blank of FIG. 8 a;
fig. 8c is a schematic structural diagram of a fourth mask blank according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;
fig. 10 is a schematic cross-sectional view of a display panel according to another embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Various embodiments of the present application are explained and illustrated below with reference to the drawings.
Referring to fig. 1, a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present invention is shown, including:
step S11: a display substrate is provided.
Specifically, the display substrate comprises a first display area and a second display area, and the second display area surrounds the first display area. A surface of the display substrate has a plurality of pixels arranged in an array, and in an embodiment, the pixels may be common red (R), green (G) and blue (B) sub-pixels. In another embodiment, the pixel point may further include a white subpixel (W), which is not limited specifically. Two adjacent pixel points have a pixel gap, and one side of the first display area of the display substrate, which is far away from the pixel points, is provided with a photosensitive device. In one embodiment, the photosensitive device may be a camera or an image sensor.
Step S12: respectively using a first mask plate and a second mask plate on one side of the display substrate, which is provided with the pixel points, to form a first electrode layer in the first display area and a second electrode layer in the second display area, wherein the first electrode layer is a patterned electrode layer, and the whole surface of the second electrode layer covers the first sub-display area of the second display area; a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second display area, and the whole surface of the third electrode layer covers the second sub-display area of the second display area; the second electrode layer and the third electrode layer cover the second display region.
Performing evaporation on a first display area and a second display area by using a mask plate evaporation manner, wherein the second display area comprises a first sub-display area and a second sub-display area; the method comprises the steps of forming a first electrode layer in a first display area by using a first mask plate on one side of a display substrate with pixel points, forming a second electrode layer covering a first sub-display area in a second display area by using a second mask plate, forming a third electrode layer covering the second sub-display area in the second display area by using a third mask plate, covering the second display area by the second electrode layer and the third electrode layer, and enabling the first electrode layer to be a patterned electrode layer.
Specifically, the formation processes of the first electrode layer, the second electrode layer, and the third electrode layer are not sequential, that is, in an embodiment, the first electrode layer correspondingly covering the first display area may be formed by a first mask plate, the second electrode layer correspondingly covering the first sub-display area may be formed by a second mask plate, and the third electrode layer correspondingly covering the second sub-display area may be formed by a third mask plate. Or, in another embodiment, a second electrode layer correspondingly covering the first sub-display region may be formed through the second mask plate, a third electrode layer correspondingly covering the second sub-display region may be formed through the third mask plate, and a first electrode layer correspondingly covering the first display region may be formed through the first mask plate, which is not limited specifically.
Specifically, referring to fig. 4, the display area of the display panel includes a first display area 412 and a second display area 411, wherein the second display area 411 further includes a first sub-display area 421 and a second sub-display area 432. The second sub-display area 432 is located at a corresponding area above the first display area 412, and the first sub-display area 421 and the second sub-display area 432 surround the first display area 412 together.
Please refer to fig. 5a and fig. 5b, wherein fig. 5a is a schematic structural diagram of a first mask plate, a second mask plate and a third mask plate. Fig. 5b is a schematic structural diagram of the display panel manufactured according to the first mask plate, the second mask plate and the third mask plate in fig. 5 a. The portion of the first mask plate 41 corresponding to the first display area 412 is a patterned hollow structure with a closed boundary. Specifically, the first mask plate 41 has a shielding portion corresponding to the second display area 411 and shielding the second display area 411. The part of the second mask 42 corresponding to the second display area 411 except for the frame is a hollow structure with a closed boundary, and includes a main part for covering the first display area 412 and shielding the second sub-display area 432; the third mask plate 43 includes a main body portion for covering the first display area 412 and the first sub-display area 421, and the position corresponding to the second sub-display area 432 is a hollow opening.
The patterned hollow structure of the first mask 41 corresponding to the first display region 412 includes a plurality of through slots 414 communicating with at least two closed external locations, so that the formed first electrode layer covers the pixel points of the first display region 412 at the through slots 414, and the first electrode layer of the first display region 412 is connected to the second electrode layer and/or the third electrode layer.
In one embodiment, the through-grooves 414 extend in a row or in a transverse direction and are disposed corresponding to the pixels, so that the first electrode layer is formed to have stripes 413 extending in the row or in the transverse direction, and covers the pixels in the row or in the transverse direction, but does not cover the pixel gaps in the row or in the transverse direction.
Specifically, as shown in fig. 5a, the patterned hollow structure of the first mask plate 41 corresponding to the first display area 412 specifically includes through slots 414 extending in a column direction, and a stripe 413 extending in the column direction is disposed between two adjacent through slots 414. The first mask plate 41 exposes the pixel points of the first display region 412 at the positions corresponding to the through slots 414. And the first mask plate 41 covers the pixel gaps of the first display region 412 extending in the column direction at positions corresponding to the stripes 413. The patterned first electrode layer formed by the first mask plate 41 covers the pixel points of the first display region 412 and exposes the pixel gaps extending in the column direction in the first display region 412.
With reference to fig. 5b, a first electrode layer 415 formed by the first mask 41 and corresponding to the first display region 412 is a patterned electrode layer, the first electrode layer 415 covers the pixels in the first display region 412, and the first electrode layer 415 exposes pixel gaps 416 between the pixels arranged along the column direction in the first display region 412, so as to improve the light transmittance of the first display region 412. In one embodiment, the first display area 412 is a transparent display area, and the light-sensing device is disposed under the display panel at a corresponding position, and the light transmittance of the light-sensing device can be improved by the patterned first electrode layer. The second electrode layer 424 formed by the second mask 42 is located in the first sub-display area 421 in the second display area 411, and specifically, the entire surface of the second electrode layer 424 covers the first sub-display area 421. The third electrode layer 433 formed by the third mask plate 43 is located in the second sub-display area 432 of the second display area 411, and specifically, the entire surface of the third electrode layer 433 covers the second sub-display area 432. The third electrode layer 433 is formed by using the third mask plate 43 alone, so that deformation and sagging of the mask plate are prevented, and the electrode layer evaporation precision of the second display area 411 is improved. In one embodiment, the second electrode layer 424 and the third electrode layer 433 cover the second display region 411 together, wherein the second electrode layer 424 and the third electrode layer 433 are made of the same material and located in the same layer. Specifically, the first electrode layer 415, the second electrode layer 424, and the third electrode layer 433 are all made of the same material, such as aluminum, magnesium, silver, and alloys thereof.
Specifically, referring to fig. 6a, the through grooves 414 may also extend along the row direction, and the first electrode layer 415 formed by evaporation extends along the row direction. Specifically, referring to fig. 6b, the through grooves 414 in the first mask 41 are correspondingly located at the positions of the pixels, and the stripes 413 between two adjacent through grooves 414 cover and shield the pixel gaps between the pixels, so that the first electrode layer 415 formed by evaporation is located at the positions of the pixels in the first display region, and the positions corresponding to the pixel gaps 416 are exposed by the first electrode layer 415.
In an embodiment, the first display area 412 may be a circle or a polygon, as shown in fig. 7a and 7 b. Specifically, when the first display area 412 is circular, the patterned hollow structure of the first mask plate 41 corresponding to the first electrode layer 415 of the first display area 412 is circular. When the first display area 412 is polygonal, for example, rectangular, as shown in fig. 7b, the first mask plate 41 corresponds to a rectangular patterned hollow structure of the first electrode layer 415 of the first display area 412, as shown in fig. 7 a. Specifically, if the first display area 412 is an oval, a drop, a square or other polygon, the first electrode layer 415 formed therein may also extend in the row direction or in the column direction, which is not described herein in detail.
In the conventional display panel, when the patterned structure of the third electrode layer is implemented, the electrode layer that completely covers the first display region 412 is usually formed by evaporation, and then holes are formed in the electrode layer by using a laser drilling method to form the patterned structure. According to the invention, the first electrode layer of the patterning structure is directly formed in the first display area 412 in a mask plate evaporation mode, so that the manufacturing cost can be reduced, the pixel points can be prevented from being damaged, the yield of the display panel is ensured, and the display effect is improved.
Fig. 2 is a schematic flow chart illustrating a method for manufacturing a display panel according to another embodiment of the present invention. The steps S21 and S22 are the same as the steps S11 and S12 in the embodiment shown in fig. 1, except that the embodiment further includes:
step S23: arranging a fourth mask plate on one side of the display substrate, which is provided with the pixel points, so as to form a fourth electrode layer laminated with the first electrode layer in the first display area; the fourth electrode layer connects the first electrode layer to the first electrode layer and/or the second electrode layer.
Specifically, referring to fig. 8a, the patterned hollow portion of the first mask plate 41 corresponding to the first display area 412 includes a plurality of separated openings 417, wherein at least a portion of the openings 417 are separated by criss-cross stripes 413. Specifically, the openings 417 correspond to positions of the pixels, and the criss-cross stripes 413 correspond to positions of the pixel gaps, so that the formed patterned first electrode layer 415 forms a plurality of unconnected block electrodes, as shown in fig. 8b, wherein the first electrode layer 415 is a plurality of block electrodes, which are not connected to each other. The first electrode layer 415 exposes the pixel gap 416 in the first display region 412. The second mask plate 42 and the third mask plate 43 have the same structure as that in fig. 5a, and the second electrode layer 424 and the third electrode layer 433 formed by the second mask plate 42 and the third mask plate 43 are the same as those in fig. 5b, which are not repeated herein. Specifically, in order to connect the first electrode layer 415 with the second electrode layer 414 and/or the third electrode layer 433 of the second display region 411, a fourth mask 44 may be disposed on a side of the second display region 411 having the pixel points, as shown in fig. 8 c. The fourth electrode layer evaporation is performed on the first display region 412 using the fourth mask plate 44, so that the first electrode layer 415 and the fourth electrode layer are stacked.
Specifically, the fourth mask 44 has a covering region 441 covering the second display region 411 and an empty region 442 exposing the first display region 412, and the fourth electrode layer formed by the fourth mask 44 is stacked on the first electrode layer 415. In one embodiment, the step of forming the fourth electrode layer may be disposed before the step of forming the first electrode layer 415, so that the formed first electrode layer 415 is located on the fourth electrode layer. Or in another embodiment, a step of forming the fourth electrode layer may be provided after the step of forming the first electrode layer 415, so that the formed first electrode layer 415 is located below the fourth electrode layer, and is not particularly limited as long as the first electrode layer 415 can be connected to the second electrode layer 414 and/or the third electrode layer 433 through the fourth electrode layer.
Specifically, the patterned first electrode layer 415 formed by the first mask 41 shown in fig. 8a is shown in fig. 8b, wherein the first electrode layer 415 is a plurality of electrode blocks that are not connected to each other and are not connected to the second electrode layer 414 and the third electrode layer 433, and therefore, a fourth electrode layer needs to be provided to connect the first electrode layer 415 to the second electrode layer 414 and/or the third electrode layer 433. In an embodiment, the first electrode layer 415 is a cathode layer corresponding to the first display area 412, and the second electrode layer 414 and the third electrode layer 433 are cathode layers corresponding to the second display area 411. The fourth electrode layer is a transparent conductive oxide, such as ITO (indium tin oxide), IZO (indium zinc oxide), or the like.
In the conventional display panel, when the patterned structure of the first electrode layer 415 is implemented, the electrode layer that completely covers the first display region 412 is usually formed by vapor deposition, and then holes are formed in the electrode layer by laser drilling to form the patterned structure of the electrode layer. According to the invention, a mask evaporation mode is adopted, the first electrode layer 415 with a patterning structure is directly formed in the first display area 412, the second display area is manufactured in two steps, and the second mask and the third mask are respectively adopted to form the electrode layer covering the second display area on the whole surface, so that the manufacturing cost can be reduced, pixel points can be prevented from being damaged, the evaporation precision is improved, the yield of the display panel is ensured, and the display effect is improved. In addition, in order to make the first display region 412 corresponding to the camera have better light transmittance, the first electrode layer 415 may be set to correspond to the patterned structure of the pixel point only, and the pixel gap corresponding region is exposed, and the fourth electrode layer is set to electrically connect the first electrode layer 415 with the third electrode layer 433 and/or the second electrode layer 414.
Fig. 3 is a schematic structural diagram of a manufacturing method of a display panel according to another embodiment of the present invention. The method comprises the following steps:
step S31: and forming a first electrode layer in the first display area by using a first mask plate on one side of the display substrate, which is provided with the pixel points.
Specifically, a portion of the first mask plate 41 corresponding to the first display area 412 is a patterned hollow structure with a closed boundary. Specifically, the first mask plate 41 has a shielding portion corresponding to the second display area 411 and shielding the second display area 411. The patterned hollow structure of the first mask 41 corresponding to the first display region 412 includes a plurality of through slots 414 communicating with at least two closed external positions, so that the formed first electrode layer covers the pixel points of the first display region 412 at the through slots 414, and the first electrode layer of the first display region 412 is connected to the second electrode layer and/or the third electrode layer. In one embodiment, the through-grooves 414 extend in a row or in a transverse direction and are disposed corresponding to the pixels, so that the first electrode layer is formed to have stripes 413 extending in the row or in the transverse direction, and covers the pixels in the row or in the transverse direction, but does not cover the pixel gaps in the row or in the transverse direction. Specifically, as shown in fig. 5a, the patterned hollow structure of the first mask plate 41 corresponding to the first display area 412 specifically includes through slots 414 extending in a column direction, and a stripe 413 extending in the column direction is disposed between two adjacent through slots 414. The first mask plate 41 exposes the pixel points of the first display region 412 at the positions corresponding to the through slots 414. And the first mask plate 41 covers the pixel gaps of the first display region 412 extending in the column direction at positions corresponding to the stripes 413. The patterned first electrode layer formed by the first mask plate 41 covers the pixel points of the first display region 412 and exposes the pixel gaps extending in the column direction in the first display region 412, as shown in fig. 5 b. The first electrode layer 415 formed by the first mask 41 and corresponding to the first display area 412 is a patterned electrode layer, the first electrode layer 415 covers the pixels in the first display area 412, and the first electrode layer 415 exposes the pixel gaps 416 between the pixels arranged in the row direction in the first display area 412, so as to improve the light transmittance of the first display area 412. In one embodiment, the first display area 412 is a transparent display area, and a photosensitive device is disposed at a corresponding position, and the light transmittance of the photosensitive device can be improved by the patterned first electrode layer 415.
In another embodiment, the through-grooves 414 may also extend along a row direction as shown in fig. 6a, and the first electrode layer 415 formed by evaporation extends along the row direction. Specifically, the through grooves 414 in the first mask plate 41 are correspondingly located at the positions of the pixels, and the stripes 413 between two adjacent through grooves 414 cover and shield the pixel gaps between the pixels, so that the first electrode layer 415 formed by evaporation is correspondingly located at the positions of the pixels, and the positions corresponding to the pixel gaps are exposed by the first electrode layer 415, as shown in fig. 6 b.
In an embodiment, the first display area 412 may be circular or polygonal, and thus, when the first display area 412 is circular, the first electrode layer 415 of the first mask 41 corresponding to the first display area 412 is circular. When the first display area is polygonal, for example, rectangular, as shown in fig. 7a, the patterned structure of the first mask 41 corresponding to the first electrode layer 415 of the first display area 412 is rectangular, as shown in fig. 7b, which is not described herein in detail.
Step S32: and forming a second electrode layer in the first sub-display area by using a second mask plate on one side of the display substrate, which is provided with the pixel points.
Specifically, the portion of the second mask plate 42 corresponding to the second display area 411 is a hollow structure with a closed boundary except for the frame, and includes a main portion for covering the first display area 412 and shielding the second sub-display area 432.
The second electrode layer 424 formed by the second mask 42 corresponds to the first sub-display area 421 in the second display area 411, and specifically, the second electrode layer 424 covers the first sub-display area 421.
Step S33: and forming a third electrode layer in the second sub-display area by using a third mask plate on the side, provided with the pixel points, of the display substrate.
Specifically, the third electrode layer 433 formed by the third mask plate 43 corresponds to the second sub-display area 432 in the second display area 411, and specifically, the third electrode layer 433 covers the second sub-display area 432.
In one embodiment, the second electrode layer 424 and the third electrode layer 433 cover the second display region 411 together, wherein the second electrode layer 424 and the third electrode layer 433 are made of the same material and located in the same layer. Specifically, the first electrode layer 415, the second electrode layer 424, and the third electrode layer 433 are all made of the same material.
Specifically, in an embodiment, if the first electrode layer 415 is a block structure that is not connected to each other as shown in fig. 8b, a fourth electrode layer is further disposed on the first electrode layer 415 through a fourth mask 44 as shown in fig. 8 c. The fourth electrode layer is a transparent conductive oxide, such as ITO (indium tin oxide), IZO (indium zinc oxide), or the like. The first electrode layer 415 is further connected to the second electrode layer 424 and the third electrode layer 433 through a fourth electrode layer.
In the conventional display panel, when the patterned structure of the first electrode layer 415 is implemented, the electrode layer that completely covers the first display region 412 is usually formed by vapor deposition, and then holes are formed in the electrode layer by laser drilling to form the patterned structure of the electrode layer. According to the invention, the first electrode layer 415 with a patterned structure is directly formed in the first display area 412 in a mask evaporation mode, so that the manufacturing cost can be reduced, pixel points can be prevented from being damaged, the yield of the display panel is ensured, and the display effect is improved. In addition, in order to make the first display region 412 corresponding to the camera have better light transmittance, the first electrode layer 415 may be set to correspond to the patterned structure of the pixel point only, and the pixel gap corresponding region is exposed, and the fourth electrode layer is set to electrically connect the first electrode layer 415 with the second electrode layer 424 and the third electrode layer 433. In the method of the present application, the first sub-display area 421 in the second display area 411 and the second electrode layer 424 and the third electrode layer 433 in the second sub-display area 432 are separately vapor-deposited, so that the vapor deposition accuracy can be improved.
Fig. 9 is a schematic cross-sectional view of a display panel according to an embodiment of the invention. The display panel includes: the display substrate 90 includes a first display area 91 and a second display area 92, wherein the second display area 92 surrounds the first display area 91.
One surface of the display substrate 90 corresponding to the first display region 91 and the second display region 92 includes a pixel defining layer 94, the pixel defining layer 94 has a pixel opening, and the plurality of pixels 93 arranged in an array are located at the pixel opening. In one possible embodiment, the pixel defining layer 94 is a high transmittance material, such as polyimide. A photosensitive device (not shown) is correspondingly disposed on a side of the first display area 91 of the display substrate 90 away from the pixel 93, and in an embodiment, the photosensitive device may be a camera or an image sensor.
One side of the second display region 92 having the pixel 93 has a second electrode layer 97 formed by a second mask and a third electrode layer (not shown) formed by a third mask. The second electrode layer 97 and the third electrode layer 97 cover the second display region 92 together.
One side of the first display region 91 having the pixel 93 has a first electrode layer 96 formed by a first mask. Specifically, the first mask plate has a patterned structure at a position corresponding to the first display region 91, so that the first electrode layer 96 is also formed as the patterned structure. Specifically, the patterned structure of the first electrode layer 96 covers the pixel 93 and extends in the row direction or the transverse direction, and the patterned structure may be a serpentine shape, a wave shape, a linear shape, or the like.
In the conventional display panel, when the patterning structure of the first electrode layer 96 is implemented, the electrode layer that completely covers the first display region 91 is usually formed by vapor deposition, and then holes are formed in the electrode layer by laser drilling to form the patterning structure of the electrode layer. According to the invention, the first electrode layer 96 with the patterning structure is directly formed in the first display area in a mask plate evaporation mode, so that the manufacturing cost can be reduced, the pixel points can be prevented from being damaged, the yield of the display panel is ensured, and the display effect is improved.
Specifically, the first electrode layer 96 shown in this embodiment may cover the pixel 93 in the first display region 91 and expose the pixel gap extending in the first display region 91 in the lateral direction, or may cover the pixel 93 in the first display region 91 and expose the pixel gap extending in the first display region 91 in the column direction.
In another embodiment, the first electrode layer 96 in the display panel of the present application may further cover the pixel 93 of the first display region 91, so as to expose all the pixel gaps in the first display region 91. Fig. 10 is a schematic cross-sectional view of a display panel according to another embodiment of the invention. Compared with the first embodiment shown in fig. 9, the difference is that: in this embodiment, the patterned structure of the first electrode layer 96 covers the pixel 93 to form a plurality of unconnected electrode blocks, and the fourth electrode layer 98 is disposed on a side of the first electrode layer 96 close to the pixel 93, or the fourth electrode layer 98 is disposed on a side of the first electrode layer 96 far from the pixel. Specifically, the fourth electrode layer 98 may also be located between the first electrode layer 96 and the pixel 93. In one embodiment, the fourth electrode layer 98 may be a transparent conductive material, such as ITO (indium tin oxide), IZO (indium zinc oxide), and the like. Specifically, the fourth electrode layer 98 may be a full-surface layer, and the full surface thereof covers the first electrode layer 96 or below. Since the fourth electrode layer 98 is a transparent material, it does not affect the light transmittance of the photosensitive device.
Specifically, the fourth electrode layer 98 is stacked on the first electrode layer 96 to connect the first electrode layer 96 to the second electrode layer 97 and/or the third electrode layer. In one embodiment, the fourth electrode layer 98 may be located above the first electrode layer 96 as shown in fig. 10; in another embodiment, the fourth electrode layer 98 may also be located below the first electrode layer 96.
In the conventional display panel, when the patterning structure of the first electrode layer 96 is implemented, the electrode layer that completely covers the first display region 91 is usually formed by vapor deposition, and then holes are formed in the electrode layer by laser drilling to form the patterning structure of the electrode layer. According to the invention, the first electrode layer 96 with the patterning structure is directly formed in the first display area 91 by adopting a mask plate evaporation mode, so that the manufacturing cost can be reduced, the pixel points can be prevented from being damaged, the yield of the display panel is ensured, and the display effect is improved. In addition, in order to make the first display region 91 corresponding to the camera have better light transmittance, the first electrode layer 96 may be set to correspond to the patterned structure of the pixel point only, and the pixel gap corresponding region is exposed, and the first electrode layer 96 is electrically connected to the second electrode layer 97 and/or the second electrode layer by setting the fourth electrode layer 98.
The display panel shown in fig. 9 to 10 provided by the present invention may be any one of a double-sided display panel, a flexible display panel, and a full-screen display panel. The flexible display panel may be applied to a curved electronic device; the double-sided display panel may be applied to a panel for enabling a person on both sides of the display panel to see the display contents; the full-screen display panel can be applied to a full-screen mobile phone or other devices, and is not limited herein.
The display panel can be applied to any products or components with display functions such as mobile phones, tablet computers, televisions, displays, notebook computers, digital photo frames, navigators and the like. Other essential components of the display panel are understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present invention.
In another aspect, the present invention provides a display apparatus, wherein the display apparatus includes a display panel and a photosensitive device, the display panel includes the display panel shown in any of the above embodiments, and the photosensitive device is located below the first display area of the display panel. Therefore, the display device can improve the light transmittance of the photosensitive device.
In a specific embodiment, the light sensing device may be a camera, and the display device provided in the present application is applied to any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. And the photosensitive device can be used as a front camera of the equipment.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for manufacturing a display panel is characterized by comprising the following steps:
providing a display substrate, wherein the display substrate is provided with a first display area and a second display area, the second display area surrounds the first display area, and the second display area comprises a first sub-display area and a second sub-display area; a plurality of pixel points which are arranged in an array mode are arranged on one surface of the display substrate, and pixel gaps are formed between every two adjacent pixel points;
respectively using a first mask plate and a second mask plate on one side of the display substrate, which is provided with the pixel points, to form a first electrode layer in the first display area and a second electrode layer in the second display area, wherein the first electrode layer is a patterned electrode layer, and the whole surface of the second electrode layer covers the first sub-display area of the second display area; a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second display area, and the whole surface of the third electrode layer covers the second sub-display area of the second display area; the second electrode layer and the third electrode layer cover the second display region.
2. The method of manufacturing according to claim 1,
the part of the first mask plate corresponding to the first display area is a patterned hollowed-out structure with a closed boundary;
the part of the second mask plate corresponding to the second display area except for a frame is of a hollow structure with a closed boundary, and comprises a main part for covering the first display area and shielding the second sub-display area;
the third mask plate comprises a main body part for covering the first display area and the first sub-display area.
3. The method of manufacturing according to claim 2,
the patterning structure of the first mask plate is a grid-shaped hollow structure, and a first electrode layer covering the pixel points of the first display area is formed by using the first mask plate;
the method further comprises the following steps:
a fourth mask plate is arranged on one side, provided with the pixel points, of the display substrate, so that a fourth electrode layer stacked with the first electrode layer is formed in the first display area; the fourth electrode layer connects the first electrode layer to the first electrode layer and/or the second electrode layer.
4. The method of manufacturing according to claim 2,
the patterning structure part of the first mask plate is provided with a plurality of through grooves communicated with at least two positions of the closed boundary, so that the formed first electrode layer covers the pixel points at the through groove positions and is connected with the second electrode layer and/or the third electrode layer.
5. The method according to claim 4, wherein the through-holes extend in a column direction or in a lateral direction and are disposed corresponding to the pixel points, so that the first electrode layer is formed to have stripes extending in the column direction or in the lateral direction, and the pixel points in the column direction or in the lateral direction are covered, and the pixel gaps in the column direction or in the lateral direction are not covered.
6. The method for manufacturing a display panel according to claim 1, comprising:
forming a first electrode layer in the first display area by using a first mask plate on one side of the display substrate, which is provided with the pixel points;
a second mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a second electrode layer is formed in the first sub-display area;
a third mask plate is used on one side of the display substrate, which is provided with the pixel points, so that a third electrode layer is formed in the second sub-display area;
the first sub-display area and the second sub-display area form the second display area, the second display area and the second sub-display area jointly surround the first display area, and the second electrode layer and the third electrode layer integrally cover the second display area and surround the first electrode layer.
7. A display panel, comprising:
the display substrate is provided with a first display area and a second display area, and the second display area surrounds the first display area;
a plurality of pixel points which are arranged in an array mode are arranged on one surface of the display substrate, and pixel gaps are formed between every two adjacent pixel points;
the first electrode layer is a patterned electrode layer covering the pixel points of the first display area;
the whole surface of the second electrode layer covers the first sub-display area of the second display area;
and the whole surface of the third electrode layer covers the second sub-display area of the second display area.
8. The display panel according to claim 7, wherein the first electrode layer has a stripe-shaped electrode layer extending in a column direction or a transverse direction, and the stripe-shaped electrode layer covers the pixel points in the column direction or the transverse direction and does not cover the pixel gaps in the column direction or the transverse direction;
wherein the first electrode layer is connected to the second electrode layer and/or the third electrode layer.
9. The display panel according to claim 7, wherein the first electrode layer includes a plurality of electrode blocks covering the pixel points, the first electrode layer exposing the pixel gaps in the first display region;
the display substrate is provided with a fourth electrode layer formed by a fourth mask plate on one side of the pixel point; the fourth electrode layer is stacked with the first electrode layer to connect the first electrode layer to the second electrode layer and/or the third electrode layer.
10. The display device is characterized by comprising a photosensitive device and a display panel;
wherein the display panel comprises the display panel of any one of claims 7 to 9;
the photosensitive device is arranged corresponding to the first display area of the display panel and is positioned on one side of the display substrate, which is far away from the pixel points.
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| CN202010626770.2A CN111951677A (en) | 2020-07-01 | 2020-07-01 | Display panel, manufacturing method thereof and display device |
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